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author | Kim Alvefur <zash@zash.se> | 2022-01-20 09:57:20 +0100 |
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committer | Kim Alvefur <zash@zash.se> | 2022-01-20 09:57:20 +0100 |
commit | d17619344dda05f9bc9b3f98a0c82f2f68939605 (patch) | |
tree | 523dfd5c7ee5a52ada870d12a315bca4f5ab3a61 /.busted | |
parent | 695fb9b8fb478cef3dd5ec5e35d704cdba5dffae (diff) | |
download | prosody-d17619344dda05f9bc9b3f98a0c82f2f68939605.tar.gz prosody-d17619344dda05f9bc9b3f98a0c82f2f68939605.zip |
util.xml: Break reference to help the GC (fix #1711)
LuaExpat uses a registry reference to track handlers, which makes
it so that an upvalue like this creates a reference loop that keeps the
parser and its handlers from being garbage collected. The same issue has
affected util.xmppstream in the past.
Code for checking:
local xml_parse = require"util.xml".parse;
for i = 1, 10000 do xml_parse("<root/>") end
collectgarbage(); collectgarbage();
print(collectgarbage("count"), "KiB");
A future release of LuaExpat may fix the underlying issue there.
Diffstat (limited to '.busted')
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